Why do dogs drool (salivate)?

Increased salivation can be caused by many different things. For example, it can be due to a direct problem with the oral cavity such as dental disease or a foreign body (such as a stick) getting stuck in the mouth. The dog may have eaten something inappropriate and feel nauseous. Other causes include inflammation of the salivary glands, toxin exposure, liver disease, oesophageal problems, neurological disease, etc. Anxious and stressed dogs can also salivate more than usual. There are some breeds that salivate more than others and in these cases salivation is not a symptom of disease.